Jpxfw is build using maven. You need to get and install it before you are able to build jxpfw. You should also set your environment i order to use maven. This documentation was written, using maven version 3.0.5.
If you get an error during the build or you can't build at all, then please check your environment. On my windows machine I use the following environment settings:
SET MVN_HOME=C:\java\apache-maven-3.0.5 SET JAVA_HOME=D:\jdk\sun-64-1.8.0_31 SET PATH=%PATH%;%MVN_HOME%\bin SET PATH=%JAVA_HOME%\jre\bin;%PATH%
This makes both maven and a jdk available on the path.